DE10225649B4 - Remote controlled releasable lock cylinder - Google Patents

Abstract

Locking device (1)
with a housing (12),
with a locking bit (3), which is rotatably mounted with respect to the housing (12),
with a handling member (2) which is rotatably mounted with respect to the housing (12),
with a coupling device (4) for controlled rotationally fixed connection of the handling member (2) with the locking bit (3),
with an electrical actuator (9) connected to a control device (11) and having an antenna (11a) for connecting and disconnecting the coupling device (4), and
with a mechanical lock (7) actuated by a key (8) for connecting and disconnecting the coupling device (4).

Description

The Invention relates to a locking device, especially for remote controlled locks.

remote-controlled closing devices are for example in cases applicable in which an increased Comfort when opening or close of doors he wishes is. This can be done in hospitals, be desired in hotels, in handicapped accessible apartments or in other cases.

For example, is from the DE 198 53 207 C2 a locking device is known which contains an access control electronics. The access control electronics checks a key inserted in the key channel for locking authorization. If this is the case, it briefly rotatably couples the cylinder core (rotor) with a locking bit in order to enable the locking or unlocking of a lock. When the clutch is open, however, the rotor of the lock can rotate freely without taking the cam.

at Failure of the electronics, the lock can not be opened.

From the EP 0978611 A2 as well as the EP 0976896 A2 a locking system is known in which a cam is rotatably connected to a lying on the inside of the door rotary knob and connected via a coupling device with a lying on the outside of the door knob. The coupling device is controlled via a code input unit.

Also Here is the function of the system of the function of the electronics dependent.

From the EP 1079050 A1 is a locking device is known, which is designed in the manner of a cylinder lock. The lock bit is lockable via a locking mechanism which in one embodiment may be electronically controlled.

From the EP 1046770 A1 In addition, a lock cylinder is known which has a rotor to be released with a key. This is connected via a switchable coupling with the cam. The clutch is engaged and disengaged by an electric actuator.

at Failure of the electrical actuator the lock can not be opened become.

Out WO 02/20924 A1 discloses a lock cylinder is known, the one electrically operated Coupling has. The clutch is with a control unit connected, over Transmitter and receiver sends an interrogation signal to an identifier and receives corresponding response signals. Beat the data transfer as a result of radio interference fails or lets the backup battery After the electric lock, the lock can no longer be opened.

From the DE 37 42 189 C2 a lock cylinder is known, which is operable from one side via a knob and from the other side via a key. The knob is rotatably connected to the cam while the key is connected via a coupling with the knob shaft. The clutch is actuated by an electromagnet, which is controlled by the electronically coded key.

at Failure of the power supply, for example due to battery aging, Can the lock from the key side not open anymore become.

From that Based on the object of the invention, a locking device to create that with increased To open security is.

This object is achieved by the locking device according to claim 1:
The locking device according to the invention has a locking bit and a handling member, which is rotatably mounted with respect to the housing. Between the handling member and the cam acts a coupling device which can be engaged and disengaged both by an electrical actuator and by a mechanical lock. This is an opening of the lock even in case of failure or failure of the electrical actuator possible. For example, this may be the case when the closing device operates battery-supported. After some time, the battery, for example, as a result of neglected maintenance, according to the relevant door can still be opened without problems by the coupling device is engaged with a key. Other applications also offer increased safety. For example, all locking devices of a locking system can be equipped with different code transmitters, code cards or the like in order to grant access to different persons in different rooms. However, uniform mechanical locks can be installed to open any door with a single key in case of emergency. Other applications are also possible.

Another advantage of the locking device according to the invention is that the closing force of neither of the electrical actuator still has to be applied by the mechanical lock. Both serve only for actuating the coupling device. Due to the mechanical connection between the cam and the handling element, for example a generously dimensioned rotary knob, which is produced when the clutch is engaged, even sluggish locks can be safely opened and closed.

The Handle member may be a lever, a knob or the like. This is a matter of concrete application.

Preferably the handling member has a key opening through which the mechanical lock accessible is. For example, this sits coaxially centric in the handling member. The operation is then particularly easy to grasp. Next, it is beneficial when the lock rotatably connected to the handle member pin housing and having a centrally located in this rotor. Is a key in the lock is inserted and this is to release the lock be turned, the hand held with the other hand become. This limits from the outset without tools on the lock exercisable Torques to a relatively low level. This can increase burglary security be created.

The Coupling device preferably has two clutches. The first clutch is assigned to the mechanical lock and will only operated by this. The second clutch is associated with the electrical actuator and is only operated by this. In this way it is ensured that the mechanical Lock and the electric actuator Do not disturb each other in their work.

at a simple and robust design are the two clutches arranged on different sides of the lock bar. This allows the full space utilization for each clutch on both sides of the lock bolt so that the two clutches robust and thus reliable to run. In addition, let they are on relatively large Dimension torques.

at a simple and structurally clear embodiment the first clutch has a first coupling half and a second coupling half, the e.g. as cylinder and cylinder sleeves interlock, wherein the non-rotatable coupling by a radially movable coupling pin is effected. The radial movement of the coupling bolt can be relative be short-stroke and by a rotation of the mechanical lock be effected. For example, the mechanical lock an eccentric pin which, upon rotation of the pin housing of the Lock associated rotary lockable Rotor by 180 ° one Radialhub accomplishes. It results in a relatively large Reduction between the rotational movement of the lock and the pin movement, so that the lock is easy to operate.

The other coupling is preferably constructed so that it alone by an axial movement, for example of the coupling ring, is actuated. This allows the stationary arrangement of the electrical actuator.

The closing device can on both sides of a handler, for example, respectively have a knob. The knob located on the inside of the door can optionally be connected to the third coupling half or to the fourth coupling half be. In the former case is also on the inside of the Door located Operating knob only then active when the electrical actuator the second Clutch has closed. When the knob on the inside of the door but with the fourth coupling half connected is a permanent one rotatable connection between the knob and the cam, so that the door Always open from the inside is.

Further Details of advantageous embodiments The invention will become apparent from the drawing, the description or Dependent claims.

In the drawing is an embodiment of Invention illustrated. Show it:

1 the locking device according to the invention in a schematic representation,

2 the closing device according to the invention in longitudinal section with two disengaged couplings,

3 + 4 the locking device after 2 with coupled second clutch, each in section,

5 + 6 the locking device with coupled first coupling device, respectively in a sectional view and

7 a modified embodiment of the closing device in a sectional view.

In 1 is a locking device 1 illustrated, which is formed for example in the form of a lock cylinder. Such is to be inserted into a lock and serves there for the operation of the trap or the bolt. To operate the closing device 1 serves a knob 2 that makes a handler. If required, this can also be designed in a different form. The knob 2 serves to turn a lock bar 3 , Between the knob 2 and the lock bit 3 is a coupling device 4 arranged in a first engaged state, a rotationally fixed connection between the knob 2 and the lock bit 3 creates and in a second disengaged state any torque transfer between the knob 2 and the lock bit 3 interrupts. It contains two couplings 5 . 6 which can alternatively or simultaneously be engaged and disengaged.

The first clutch 5 is a mechanical cylinder lock 7 assigned as the actuating device for the clutch 5 serves. The cylinder lock 7 for example, via a key 8th be actuated, so that ultimately the clutch 5 with the key 8th can be engaged and disengaged.

The second clutch 6 is an electrical actuator 9 assigned by a control device 11 , For example, via a code card, a teleconference link or any other electrical or electronic input device or communication device receives signals indicating the activation of the actuator 9 instruct.

The locking device described so far 1 works as follows:
When the coupling device 4 disengaged is the knob 2 be turned without the cam 3 would be moved. An opening of the locking device 2 is not possible. Receives the controller 11 however, a signal indicating the release of the door controls the actuator 9 which in turn is the clutch 6 at least for a predetermined time. This is a rotationally fixed connection between the knob 2 and the lock bit 3 produced. Turn the knob 2 can the cambar 3 rotated and thus, for example, a door to be opened.

Upon receipt of a closing signal or upon expiration of a predetermined waiting time, the controller controls 11 the actuating device 9 turn on to the clutch 6 to separate. The cambar 3 is then through the knob 2 not to operate anymore.

Alternatively, the locking device 1 with the key 8th be opened. This one is in the cylinder lock 7 introduced. Its rotation becomes the first clutch 5 engaged, causing the knob 2 turn to turn the lock 3 can serve. The locking device 1 , in the 1 is illustrated in principle is in 2 illustrated in detail. It is from a housing 12 recorded, for example, from the 3 and 4 has apparent classic form of a lock cylinder. It has an upper tubular part 14 on, about the middle through a slot 15 in two sections 14a . 14b is divided. In the slot 15 sits the cam 3 which is rotatable to one to the tubular part 14 concentric running imaginary central axis is held.

The cambar 3 is rotatably with a multi-shouldered sleeve 17 connected, which is a longitudinal bore 18 having. To one side of the locker 3 The sleeve forms 17 thus a pipe extension 19 , On the opposite side of the locker 3 the sleeve expands 17 to an annular hollow cylinder section 21 , This forms the second coupling half of the first clutch 5 , The sleeve 17 sits with the cylindrical outer surface of the hollow cylinder portion 21 rotatable in the bore of the section 14b of the tubular part 14 , With its cylindrical inner surface 22 take the sleeve 17 a cylindrical outer surface 23 a wave 24 up, extending from the knob 2 starting first as a hollow cylindrical section up to the hollow cylinder section 21 and then through the entire tube extension 19 extends through. The in the hollow cylinder section 21 sitting part of the shaft 24 forms a first coupling half 25 the clutch 5 , In uncoupled state are the wave 24 and the sleeve 17 freely rotatable against each other. The knob 2 Can be screwed or otherwise, in 2 only by dash-dotted lines 26 . 27 indicated, means rotatably with the hollow cylindrical portion of the shaft 24 be connected. This is with little play in the section 14b rotatably mounted.

The knob 2 has a central opening 28 on, through which a keyhole opening 29 one in the wave 24 sitting rotor 31 is accessible. This forms with the hollow cylindrical part of the shaft 24 , which forms a pin housing, the cylinder lock 7 , This also points into radial bores 32 . 33 . 34 sitting split locking pins 35 . 36 . 37 on, through which the rotor 31 at rest with the shaft 24 , ie the pin housing, is locked. With the key 8th let the locking pins 35 . 36 . 37 each in the open position, so that the rotor 31 then against the wave 24 and thus against the knob 2 is rotatable.

The rotor 31 carries at its inner end an eccentric pin 38 which extends in the axial direction. The eccentric pin 38 engages in a recess of a coupling pin 39 standing in a cross hole 41 the first coupling half 25 sitting. In a bore of the coupling bolt 39 sits a spring biased outward pin 42 , the a transverse bore 43 the second coupling half 21 assigned. The eccentric pin 38 and the recess of the coupling pin 39 are dimensioned so that the pin 32 just not in the cross hole 43 sits when the castle 7 Is blocked.

On the other side of the locker 3 , within the section 14a is the second clutch 6 arranged. This includes a wave extension 44 the wave 24 , one to the clutch 6 belonging third coupling half forms and the tube extension 19 , which is the fourth coupling half of the clutch 6 forms. The wave extension 44 has an annular groove 45 on, of which one or more groove extensions 46 extend away in the axial direction. The tube extension points in the same area 19 one or more slot openings or similar openings 47 on top of both the annular groove 45 as well as the groove extensions 46 at least partially cover. The openings extend in the axial direction. They are from coupling pins 48 a coupling ring 49 passed through, the axially displaceable in the section 14a and on the pipe extension 19 sitting.

The coupling pins 48 of the coupling ring 49 extend through the breakthroughs 47 and thus couple the coupling ring 49 rotationally fixed to the tube extension 19 , Grab in the ring groove 45 , do not make a rotationally fixed connection between the third and the fourth coupling half, ie between the shaft extension 44 and the tube extension 19 ago. Will the coupling ring 19 however, shifted so that the coupling pins 48 in the groove extensions 46 advised, a rotationally fixed connection between the coupling halves is effected.

The coupling ring 49 is between two compression springs 51 . 52 held. The compression spring 51 it supports itself between the coupling ring 49 and the lock bit 3 from. The compression spring 52 supports itself between the coupling ring 49 and a non-rotatable in the section 14a held curve follower element 53 off, with its central bore on the pipe extension 19 sitting. It points to the of the coupling ring 49 distant side an oblique surface 54 whose surface normal to the longitudinal axis of the tube extension 19 includes an acute angle. The inclined surface 54 is at a hub 55 a gear 56 formed, which is the electrical actuator 9 belongs. The gear 56 is rotatable on a stationary storage facility 57 , For example, in the form of a suitably held sleeve, which supports the gear 56 also supported in the axial direction. In addition, the storage facility 57 an electric motor 58 keep it stationary, its pinion 59 with the tooth wheel 56 combs. The locking device described so far 1 works in detail as follows:
In the in 2 illustrated state are neither the coupling 5 still the clutch 6 indented. The knob 2 Can be rotated freely without the cam 3 take. Should the locking device 1 now released for opening, the electric motor 58 so driven that the gear 56 is rotated about 180 °. The coupling 6 gets into the in the 3 and 4 illustrated state. The rotation of the gear 56 180 ° causes the previously abutting faces of the cam follower element 53 and the hub 55 no longer in abutment, because the cam follower element 53 is like 3 illustrated by a pen 61 in the case 12 sits, axially displaceable but secured against rotation. The gear 56 is also mounted axially immovable, so that the cam follower element 53 in the 2 . 3 and 4 to the right, ie to the coupling ring 49 to dodge. The coupling pins 48 drive in the Nutfortsätze 46 when they are in front of the groove extensions. Find the coupling pins 48 however, on the flanks of the annular groove 45 first a plant, compresses the compression spring 52 , However, once a first rotation of the wave extension 44 by pressing the rotary knob 2 starts and the coupling pins 48 in the area of the groove extensions 46 advised, the coupling ring jumps 49 in coupling position. Thus, the clutch 6 in Einkuppelposition and the knob 2 is rotatable with the cam 3 connected.

Should the locking device 1 however, mechanically with the key 8th Be released, the key is in the lock 7 plugged in and 180 ° against the knob 2 twisted. The 5 and 6 illustrate the result. The eccentric pin 38 moves the coupling pin 39 in the radial direction that the pin 42 in one of the existing transverse bores 43 einfindet. If he stands next to such a hole is the pin 42 against the force of one in the coupling pin 39 existing compression spring tensioned and jumps into the transverse bore 43 a, as soon as he presses a knob 2 finds. Thus, a rotationally fixed connection between the knob 2 and the lock bit 3 made, so that the locking device 1 can be opened. As the 5 and 6 illustrate is the clutch 5 disengaged, ie not involved.

The 3 to 6 illustrate variations of the embodiment according to 2 , For example, at the wave extension 44 a plurality of axially spaced annular grooves 45 . 45a . 45b be provided, which are each connected via Nutfortsätze together. Accordingly, the tube extension 19 be provided with multiple slot openings to the clutch 5 to be able to arrange at different positions. This can be meaningful if the length of the lock cylinder to different applications should be adjusted.

Further, it may be appropriate or necessary, at the knob 2 opposite side another handle member, such as another knob 62 to arrange. This one can, like 6 illustrates several cross-holes 63 . 64 alternatively, to him with the tube extension 19 or the wave extension 44 to be able to connect. Is he using the tube extension 19 connected, is a rigid connection with the cam 3 in front. This can thus independent of the switching state of the couplings 5 . 6 with the knob 62 be operated. Is the knob 62 however, with the wave extension 44 connected, there is only one connection to the cam 3 when the clutch 5 or the clutch 6 is indented.

In 7 is a modified embodiment of the locking device 1 illustrated. As far as this embodiment coincides with the above-described embodiments, reference is made to the previous description without re-explanation and reference on the basis of the same reference numerals.

The locking device 1 has a modified second clutch 6 on, which acts as a one-way clutch in a first, disengaged state. In this state, it allows a power transmission from the knob 62 on the cam 3 only in one direction of rotation, which corresponds to the closing direction. In the direction of opening corresponding to the direction of rotation of the cam 3 but not by means of the rotary knob 62 to be moved when the clutch 6 is in this state.

In a second, coupled state, the clutch transmits 6 the rotation of the knob 62 on the cam 3 however in both directions of rotation.

To achieve this, the Nutfortsätze 46 trained in a special way. They have a first section 46a in which a groove flank is axially aligned and the opposite groove flank is arranged at an angle of, for example, 45 ° to the axial direction. Are the coupling pins 48 in this area of the groove continues 46 , they drive the tubular extension 19 only with, if the axially aligned flanks against the coupling pins 48 to press. On the other hand, if the opposing inclined flanks are running against the coupling pins, the coupling ring will become 49 to the left ( 7 ) and snaps with its coupling pins 48 in the next groove extension. A power transmission does not come about.

In contrast, the coupling pins are in the parallel flankig limited section 46b of the groove extension 46 , is a tight coupling between the extension 19 and the wave extension 44 given in both directions. This version of the coupling 6 has the advantage that the door always with the knob 62 can be closed and only for opening a rotary connection by the electrical actuator 9 must be made. This possibility increases the ease of use, because when closing, neither mechanically nor electrically a clutch must be engaged.

Another variation of in 7 illustrated locking device 1 lies in the formation of the coupling bolt 39 , This takes the eccentric pin 38 with play on, by a in an end recess of the coupling pin 39 seated compression spring 39a is overcome to one side. Is the eccentric pin located 38 in the in 7 illustrated position, is the clutch 5 disengaged. Will the cylinder 31 however, turned by 180 °, is the coupling pin 39 released, leaving him at the next opportunity under the action of the force of the compression spring 39a in the cross hole 43 can engage. This gives the clutch 5 a robust construction.

The locking device 1 to 7 has a third clutch 71 on, the first and second clutch 5 . 6 is connected in parallel mechanically. When engaged, it causes a coupling between the cam 3 and the wave 24 , The clutch 71 is a castle 72 assigned that via a separate key 73 is to be operated.

The coupling 71 has a coupling ring 74 on, the axially displaceable and rotationally fixed to the shaft 24 connected is. He points inward fingers 75 on, in elongated slot-shaped recesses 76 the wave 24 to grab. The coupling ring 74 is between two compression springs 77 . 78 kept floating. He points to his the lock-beard 3 facing side an axial extension 79 on which an axial extension 81 the locker 3 assigned. The axial processes 79 . 81 are sized so that they can not engage when the coupling ring 74 in a, right position, whereas they can engage when in a second, left position. To the coupling ring 74 To be able to shift axially in this respect is a tax ring 82 provided on the shaft 24 sits axially displaceable. He points to his the coupling ring 74 facing side an axial annular surface for supporting the compression spring 78 on. On its opposite side it is with a conical surface 83 provided with a control bolt 84 in plant stands. This one is in relation to the wave 24 radially movable in a bore 85 of the housing 12 stored. A compression spring 86 Tension the control bolt 84 in radial direction outwards. The castle 72 serves by means of one on its rotatable cylinder 87 held eccentric bolt 88 to, the control bolt 84 if necessary, to move in a radially inne re position. In this pushes the control bolt 84 the tax ring 82 so far in coupling direction ( 7 to the left) that the axial processes 79 . 81 can come into contact when the knob 2 being turned by hand. The castle 72 Incidentally, it is constructed in a conventional manner, its pin housing is from the housing 12 educated.

Both locks 8th . 72 are accessible from the same side. For example, the additional lock 72 be the same in all locks of a locking system, so that a centrally stored key, for example for emergency services, is accessible and can open all locks.

Another, in all the embodiments described above, to be realized possible embodiment variant is from the 1 and 3 seen. The control device 11 , for example, to the electric motor 58 or can be arranged in the vicinity, is via a line 91 passing through the housing 12 can lead, with the antenna 11a connected to one of the outside of the door facing end side of the housing 12 is arranged. Thus, the installation of the locking device according to the invention in existing doors designed particularly simple. It is only the special locking device 1 to install like a conventional lock cylinder in the door. The antenna 11a lies automatically on the outside of the door, where it receives door opening signals as needed. Because of this convenient location can be used to save power with low signal levels. The antenna feeders are fixed. An impairment of the radio signals, even when installing the locking device according to the invention 1 in steel doors is not to be feared. The antenna 11a can be in or on the cylinder housing 12 be arranged.

The locking device according to the invention has between a handling member 2 and a cam two clutches 5 . 6 on, one of which with a cylinder lock 7 and the other with an electric actuator 9 is to be engaged and disengaged. This makes it possible, regardless of the operability of the electrical actuator 9 Access to with the locking device 1 to get secured rooms.

Claims (20)

Locking device ( 1 ) with a housing ( 12 ), with a locking bit ( 3 ), with respect to the housing ( 12 ) is rotatably mounted, with a handling member ( 2 ), with respect to the housing ( 12 ) is rotatably mounted, with a coupling device ( 4 ) to the controlled rotationally fixed connection of the handling member ( 2 ) with the cam ( 3 ), with an electrical actuator ( 9 ) connected to a control device ( 11 ) and one antenna ( 11a ), for connecting and disconnecting the coupling device ( 4 ), and with one of a key ( 8th ) operated mechanical lock ( 7 ) for connecting and disconnecting the coupling device ( 4 ). Locking device according to claim 1, characterized in that the coupling device ( 4 ) a first clutch ( 5 ) and a second clutch ( 6 ) and that the mechanical lock ( 7 ) with the first clutch ( 5 ) and the electrical actuator ( 9 ) with the second clutch ( 6 ) connected is. Locking device according to claim 2, characterized in that the second clutch ( 6 ) has a first state in which it has as a one-way clutch in only one direction of rotation a drive connection between its coupling halves, and has a second state in which it couples in both directions of rotation. Locking device according to claim 1, characterized in that the handling member ( 2 ) is a knob. Locking device according to claim 1, characterized in that the lock ( 7 ) a key opening ( 29 ) through an opening ( 28 ) of the handler ( 2 ) is accessible. Locking device according to claim 1, characterized in that the first clutch ( 5 ) a first coupling half ( 25 ) with a cylindrical outer surface ( 23 ) and a second coupling half ( 21 ) with a cylindrical inner surface ( 22 ), wherein the inner surface ( 22 ) the outer surface ( 23 ) with play surrounds and whereby a coupling bolt ( 39 ) radially movable in such a way in the first coupling half ( 25 ) is stored in a retracted position within the first coupling half ( 25 ) and that in a coupling position the outer surface ( 23 ) projected radially and in a transverse bore ( 43 ) of the second coupling half ( 21 ) to hold the coupling halves ( 21 . 25 ) rotatably coupled with each other. Locking device according to claim 6, characterized in that the second coupling half ( 21 ) rotatably with the cam ( 3 ) connected is. Locking device according to claim 6, characterized in that the lock ( 7 ) a rotatably lockable cylinder ( 31 ) with an eccentric pin ( 38 ), which in a recess of the coupling pin ( 39 ) attacks. Locking device according to claim 6, characterized in that the coupling pin ( 39 ) has a bore in which a pin ( 42 ) slidably and resiliently biased radially outward. Locking device according to claim 3, characterized in that the second clutch ( 6 ) mechanically parallel to the first clutch ( 5 ) is arranged. Locking device according to claim 3 and 6, characterized in that the second clutch ( 6 ) a third coupling half ( 44 ) and a fourth coupling half ( 19 ), wherein the third coupling half ( 44 ) with the first coupling half ( 25 ) and the fourth coupling half ( 19 ) with the second coupling half ( 21 ) connected is. Locking device according to claim 3, characterized in that the two clutches ( 5 . 6 ) on different sides of the lock bill ( 3 ) are arranged. Locking device according to claim 11, characterized in that the third coupling half ( 44 ) a wave ( 17 ), on which the fourth coupling half ( 19 ) is rotatably seated in the form of a tube or a bush, wherein the shaft ( 17 ) an annular groove ( 45 ) with one or more axial groove extensions ( 46 ) and the fourth coupling half ( 19 ) at least one axially extending slot-like aperture ( 47 ), and that on the fourth coupling half ( 19 ) an axially displaceable coupling ring ( 49 ), who has at least one breakthrough ( 47 ) radially inwardly penetrating coupling pin ( 48 ) having. Locking device according to claim 13, characterized in that the coupling ring ( 49 ) between two axially acting springs ( 51 . 52 ) is held. Locking device according to claim 14, characterized in that one of the springs ( 51 . 52 ) on an actuator ( 53 ) of the electrical actuator ( 9 ) is supported. Locking device according to claim 1, characterized in that the electrical actuating device ( 9 ) a rotatably mounted member ( 56 ) connected to a cam surface having a cam follower means ( 53 ) assigned. Locking device according to claim 13, characterized in that a second handling member ( 62 ) is provided, the non-rotatably with the third coupling half ( 44 ) connected is. Locking device according to claim 13, characterized in that a second handling member ( 62 ) is provided, the non-rotatably with the fourth coupling half ( 19 ) connected is. Locking device according to claim 1, characterized in that the coupling device ( 4 ) a third clutch ( 71 ) which, for operation with a lock ( 72 ) connected is. Locking device according to claim 1, characterized in that the antenna ( 11a ) on the housing ( 12 ) is arranged.